import java.util.Locale;
import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Microsoft
 * Date: 2023-01-08
 * Time: 9:29
 */
public class Test {
    public String toLowerCase(String s) {
        StringBuilder stringBuilder = new StringBuilder();
        for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
            if(ch >= 'A' && ch <= 'Z') {
                ch = (char)(ch + 'a' - 'A');
            }
            stringBuilder.append(ch);
        }
        return stringBuilder.toString();
    }
    public static void main(String[] args) {

    }
}

